CN102330649A - Plunger water pump and liquid control system thereof - Google Patents

Plunger water pump and liquid control system thereof Download PDF

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Publication number
CN102330649A
CN102330649A CN201110272366A CN201110272366A CN102330649A CN 102330649 A CN102330649 A CN 102330649A CN 201110272366 A CN201110272366 A CN 201110272366A CN 201110272366 A CN201110272366 A CN 201110272366A CN 102330649 A CN102330649 A CN 102330649A
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CN
China
Prior art keywords
oil
water
cylinder
communicated
plunger
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Pending
Application number
CN201110272366A
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Chinese (zh)
Inventor
史先信
冯瑜
徐小东
赵阳光
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Xuzhou Heavy Machinery Co Ltd
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Xuzhou Heavy Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xuzhou Heavy Machinery Co Ltd filed Critical Xuzhou Heavy Machinery Co Ltd
Priority to CN201110272366A priority Critical patent/CN102330649A/en
Publication of CN102330649A publication Critical patent/CN102330649A/en
Priority to PCT/CN2012/071111 priority patent/WO2013037198A1/en
Priority to RU2014113204/06A priority patent/RU2579540C2/en
Priority to BR112014005904A priority patent/BR112014005904A2/en
Priority to AU2012308005A priority patent/AU2012308005A1/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00Pumping installations or systems
    • F04B23/04Combinations of two or more pumps
    • F04B23/06Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/117Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
    • F04B9/1172Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each pump piston in the two directions being obtained by a double-acting piston liquid motor

Abstract

The invention discloses a plunger water pump. The plunger water pump provided by the invention comprises two plunger groups which are composed of water cylinders and oil cylinders, a water cylinder piston and an oil cylinder piston of each plunger group are synchronously displaced, a water gap of each water cylinder barrel is provided with a water inlet one-way valve which is in one-way conduction with a cylinder tube cavity from the outside and a water outlet one-way valve which is in one-way conduction with the cylinder tube cavity from the cylinder tube cavity to the outside; and two oil cylinders are alternately stretched under the control of a control valve. The plunger water pump provided by the invention breaks through a traditional water pump structural principle, two oil cylinders are adopted to alternately move and retreat, thereby driving two water cylinders pistons to alternately move, and further the switch of two working conditions is respectively realized; compared with the prior art, the plunger water pump is capable of effectively improving the output flow and the water utilization pressure on the basis of the continuous no-interval foundation; and the invention also provides a liquid control system of the plunger water pump.

Description

A kind of plunger water pump and hydraulic control system thereof
Technical field
The present invention relates to the engineering machinery technology, particularly a kind of plunger water pump and hydraulic control system thereof.
Background technique
Along with constantly riseing of commercial and civilian skyscraper whole height, one of difficult problem of its fire-fighting system is the water supply difficulty.As everyone knows, the fire-fighting water that most of fire water supplies provide all needs fire service pump to pressurize, when satisfying fire extinguishing to the requirement of the hydraulic pressure and the water yield.Such as, be example with the mobile device fire-fighting truck, it installs fire water pump usually is that fire extinguishing terminals such as fire-fighting lance, Fire water monitor provide press water.Obviously, well behaved fire water pump all plays decisive role to the formulation of fire-fighting tactics, the enforcement of extinguishing method.
In the existing technology, the fire water pump that is used for supplying water mainly contains two types of Centrifugal water pump and plunger type water pumps; Limited by self structure, both can only deliver to the height about hundred meters with water usually, after the skyscraper breaking out of fire; Because pressure of supply water and flow are not enough; Can not timely and effective conveying water source, thus uncontrollable fire spreading often causes very large loss of life and property.Wherein, Centrifugal water pump exists leakage and reflux problem in the course of the work, and along with the increase of discharge pressure, leakage and capacity of reflux increase synchronously, and discharge pressure is difficult to reach the standard that the high-pressure service fire pump rated pressure is not less than 4.0MPa, and working efficiency reduces; Generally all be no more than 10L/s and the working principle of plunger type water pump has limited its output flow, can't satisfy the requirement of skyscraper fire-fighting fire extinguishing water consumption.
In view of this, demanding urgently looking for another way is optimized design to water pump, satisfies the requirement of skyscraper fire-fighting fire extinguishing with water pressure and output flow to provide.
Summary of the invention
To above-mentioned defective, the technical problem that the present invention solves is, a kind of plunger water pump is provided, and with reliable raising pump output pressure and flow, satisfies the demand of skyscraper fire-fighting fire extinguishing.On this basis, the present invention also provides a kind of hydraulic control system of this plunger water pump.
Plunger water pump provided by the invention; Comprise two plunger groups that constitute by water vat and oil cylinder; The water vat piston of each plunger group and oil cylinder piston synchronous shift, and with the mouth of a river of each water vat cylinder barrel all be communicated be provided with by outward to the water inlet one-way valve of the unidirectional conducting of inner cavity of cylinder, by the water one-way valve that goes out of inner cavity of cylinder to the unidirectional conducting of outside water outlet; Two said oil cylinders are configured under the control of control valve alternately flexible.
Preferably, also comprise water tank, two said water vats are built in the said water tank.
Preferably, offer the through hole that is communicated with said water tank on the water vat cylinder barrel sidewall of the rod chamber outer end of said water vat.
Preferably, said outside water outlet is positioned at and two said ends that go out the outlet pipe that water one-way valve is communicated with.
The hydraulic control system of plunger water pump as previously mentioned provided by the invention; Comprise pressure oil circuit and oil return circuit; Said control valve is configured to have two working positions: in first working position; The pressure oil circuit is communicated with the rodless cavity of first oil cylinder, the rod chamber of second oil cylinder, and oil return circuit is communicated with the rod chamber of first oil cylinder, the rodless cavity of second oil cylinder; In second working position, the pressure oil circuit is communicated with the rod chamber of first oil cylinder, the rodless cavity of second oil cylinder, and oil return circuit is communicated with the rodless cavity of first oil cylinder, the rod chamber of second oil cylinder.
Preferably, said control valve is specially: be arranged on two chambeies of first oil cylinder and the first hydraulic control directional control valve between pressure oil circuit and the oil return circuit, and be arranged on two chambeies of second oil cylinder and the second hydraulic control directional control valve between pressure oil circuit and the oil return circuit; And two said oil cylinders all offer the hydraulic fluid port of winning the confidence that is communicated with inner cavity of cylinder, said win the confidence hydraulic fluid port and the rodless cavity end between the cylinder barrel sidewall of distance greater than oil cylinder piston length place on; And the hydraulic fluid port of winning the confidence of said first oil cylinder is communicated with the control port of the said first hydraulic control directional control valve and the second hydraulic control directional control valve; To drive the first hydraulic control directional control valve and the second hydraulic control directional control valve lays respectively at first working position and second working position; The hydraulic fluid port of winning the confidence of said second oil cylinder is communicated with the control port of the said first hydraulic control directional control valve and the second hydraulic control directional control valve, to drive the first hydraulic control directional control valve and the second hydraulic control directional control valve lays respectively at second working position and first working position.
Preferably; Also comprise two valves of winning the confidence that are separately positioned between two oil cylinders and the corresponding hydraulic control directional control valve, the filler opening of each valve of winning the confidence is communicated with the hydraulic fluid port of winning the confidence of corresponding oil cylinder, the pressure balance hydraulic fluid port is communicated with the hydraulic fluid port of the rod chamber of corresponding oil cylinder, oil outlet is communicated with the control port of corresponding hydraulic control directional control valve.
Preferably; The cylinder barrel bottom of two said oil cylinders is provided with the buffering bypass of regaining the unidirectional conducting of direction along piston; The oil outlet of said buffering bypass is communicated with inner cavity of cylinder through cylinder tube bottom, and the filler opening of said buffering bypass is communicated with inner cavity of cylinder through the cylinder barrel sidewall of the distance between bottom cylinder barrel greater than oil cylinder piston length place.
Preferably, pressure oil route first oil pump feed that is communicated with first oil cylinder through the said first hydraulic control directional control valve, pressure oil route second oil pump feed that is communicated with second oil cylinder through the said second hydraulic control directional control valve; And, between the liquid outlet of two pumps and oil return circuit, be provided with relief valve.
Preferably, said relief valve is specially automatically controlled relief valve.
Plunger water pump provided by the invention comprises that two constitute the plunger group, the water vat piston of each plunger group and oil cylinder piston synchronous shift, i.e. hydraulic control double-plunger water pump by water vat and oil cylinder; Since with the mouth of a river of each water vat cylinder barrel all be communicated be provided with by outward to the water inlet one-way valve of the unidirectional conducting of inner cavity of cylinder, by the water one-way valve that goes out of inner cavity of cylinder to the unidirectional conducting of outside water outlet, and two said oil cylinders are configured under the control of control valve, alternately stretch.Compared with prior art; The present invention has broken through traditional water pump structure principle; Adopt two oil cylinders to leapfrog, retreat, thereby drive the alternating movement of two water vat pistons, and then realize the switching of two kinds of working staties respectively: one of which; Non-conduction with the water inlet one-way valve that the mouth of a river of the first water vat cylinder barrel is communicated with, go out the water one-way valve conducting; The water inlet one-way valve conducting that is communicated with the mouth of a river of the second water vat cylinder barrel, to go out water one-way valve non-conduction, under this state, and the first water vat cylinder barrel draining, the suction of the second water vat cylinder barrel.Its two, the water inlet one-way valve conducting that is communicated with the mouth of a river of the first water vat cylinder barrel, to go out water one-way valve non-conduction, non-conduction with the water inlet one-way valve that the mouth of a river of the second water vat cylinder barrel is communicated with, go out the water one-way valve conducting; Under this state, the suction of the first water vat cylinder barrel, the second water vat cylinder barrel draining.Can actual sealing configuration reliably between water vat piston of the present invention and the water vat cylinder barrel, let out in can effectively preventing; Therefore; Through the said structure optimal design, the present invention can effectively improve output flow and use water pressure not having on the basis of intermittently supplying water continuously; Through production testing, this programme can satisfy the requirement of skyscraper fire-fighting fire extinguishing with water pressure 8.0MPa and output flow 40L/s fully.
In preferred version of the present invention; On the water vat cylinder barrel sidewall of the rod chamber outer end of water vat, offer the through hole that is communicated with water tank, on the one hand, this through hole can be used to the pressure that volume-variation produces in the water vat cylinder barrel rod chamber in the balance water vat piston motion process; That is to say; When the water vat piston advanced in cylinder barrel, water vat piston rod chamber side volume became the big vacuum that produces, and external water gets into through this through hole; Otherwise, when the water vat piston is retreated in cylinder barrel, the water vat piston rod chamber side volume generation pressure that diminishes, water then extrudes from this through hole.In addition, water can from through hole into and out of, thereby the oil cylinder piston bar that is connected with the water vat piston of cooling, and piston rod can cool off hydraulic oil, thereby has effectively controlled heat transmission of hydraulic system.
In the preferred version of plunger water pump hydraulic control system provided by the present invention, two oil cylinders all offer the hydraulic fluid port of winning the confidence that is communicated with inner cavity of cylinder, and this hydraulic fluid port of winning the confidence is configured to be positioned at corresponding oil cylinder and stretches out rodless cavity side constantly fully; And the control port of the first hydraulic control directional control valve is communicated with the hydraulic fluid port of winning the confidence of first oil cylinder, and the control port of the second hydraulic control directional control valve is communicated with the hydraulic fluid port of winning the confidence of second oil cylinder.That is to say that when piston extend out to stroke terminal, the pressure oil liquid that the respective drive piston stretches out will feed back to the control end of the directional control valve of another oil cylinder, and then drive its spool switching-over, vice versa; Thereby control alternately stretching out, regaining of two oil cylinders through hydraulic automatic, have the characteristics of reliable operation.The preferred valve of winning the confidence that adopts is arranged on corresponding winning the confidence between hydraulic fluid port and the control valve, can further improve the functional reliability of the switching-over of surging; Simultaneously, when oil cylinder piston when stretching out limit position, the pressure oil liquid of rodless cavity can be through the valve one-way flow of winning the confidence to rod chamber, and then avoids stretching out the terminal and produce and impact, and influences the stability of system works.
Plunger water pump provided by the invention and hydraulic control system thereof are applicable to any fire-protection equipment and system.
Description of drawings
Fig. 1 is the overall structure schematic representation of plunger water pump described in the embodiment;
Fig. 2 is the structural representation of the cylinder barrel of water vat described in the embodiment;
Fig. 3 is the schematic diagram of the hydraulic control system of plunger water pump described in the embodiment.
Among the figure:
The first plunger group 1; First water vat 11; The first water vat cylinder barrel 111; First oil cylinder 12; The hydraulic fluid port 121 of winning the confidence; First oil cylinder piston 122; The first water inlet one-way valve 13; First goes out water one-way valve 14; The second plunger group 2; Second water vat 21; The second water vat cylinder barrel 211; Second oil cylinder 22; The hydraulic fluid port 221 of winning the confidence; Second oil cylinder piston 222; The second water inlet one-way valve 23; Second goes out water one-way valve 24; Water tank 3; Outlet pipe 4; The first hydraulic control directional control valve 51; The second hydraulic control directional control valve 52; First valve 61 of winning the confidence; Second valve 62 of winning the confidence; First pump 71; Second pump 72; First relief valve 81; Second relief valve 82; Through hole 9.
Embodiment
Core of the present invention provides a kind of hydraulic control double-plunger water pump of structure optimization; Comprise that two constitute the plunger group by water vat and oil cylinder; The water vat piston of each plunger group and oil cylinder piston synchronous shift, and with the mouth of a river of each water vat cylinder barrel all be communicated be provided with by outward to the water inlet one-way valve of the unidirectional conducting of inner cavity of cylinder, by the water one-way valve that goes out of inner cavity of cylinder to the unidirectional conducting of outside water outlet; Two said oil cylinders are configured under the control of control valve alternately flexible.Compared with prior art, the present invention can reliably improve pump output pressure and flow, thereby satisfies the demand of skyscraper fire-fighting fire extinguishing.
Be without loss of generality, specify this mode of execution below in conjunction with Figure of description.
See also Fig. 1, this shows the overall structure schematic representation of the said plunger water pump of this mode of execution.
The first plunger group 1 is made up of first water vat 11 and first oil cylinder 12, and the second plunger group 2 is made up of second water vat 21 and second oil cylinder 22.As shown in the figure, the external part of both oil cylinder piston bars all is connected with corresponding water vat piston, with water vat piston and the oil cylinder piston synchronous shift that realizes each plunger group.Integral arrangement, water vat and oil cylinder can be as shown in the figure coaxial setting, also can the almost parallel setting, obviously, the structure of coaxial setting realizes comparatively simple, and the efficiency of transmission of power is best, so be optimal case.
Be communicated with the mouth of a river of the first water vat cylinder barrel 111 and be provided with the first water inlet one-way valve 13, to realize by outward to the unidirectional conducting of inner cavity of cylinder; Simultaneously, be communicated with the mouth of a river of the first water vat cylinder barrel 111 and be provided with first and go out water one-way valve 14, to realize by inner cavity of cylinder to the unidirectional conducting of outside water outlet.Equally, be communicated with the mouth of a river of the second water vat cylinder barrel 211 and be provided with the second water inlet one-way valve 23, to realize by outward to the unidirectional conducting of inner cavity of cylinder; Simultaneously, be communicated with the mouth of a river of the second water vat cylinder barrel 211 and be provided with second and go out water one-way valve 24, to realize by inner cavity of cylinder to the unidirectional conducting of outside water outlet.Because it is alternately flexible that two oil cylinders are configured under the control of control valve, therefore two water vat pistons respectively under the drive of two oil cylinder pistons timed delivery for stretching.Particularly, outside water outlet is positioned at and two ends that go out the outlet pipe 4 that water one-way valve is communicated with, and is used for and the water pipeline connection.
Specific operation process is: control rodless cavity oil-feed, the rod chamber oil return of first oil cylinder 12, simultaneously, the rod chamber oil-feed of second oil cylinder 22, rodless cavity oil return; Under this state, the first water inlet one-way valve is 13 non-conduction, first go out water one-way valve 14 conductings, 11 drainings of first water vat, and it is non-conduction that the second water inlet one-way valve, 23 conductings, second go out water one- way valve 24,21 suctions of second water vat.Control rodless cavity oil return, the rod chamber oil-feed of first oil cylinder 12, simultaneously, the rod chamber oil return of second oil cylinder 22, rodless cavity oil-feed; Under this state, it is non-conduction that first water inlet one-way valve 13 conductings, first go out water one- way valve 14,11 suctions of first water vat, and the second water inlet one-way valve is 23 non-conduction, second go out water one-way valve 24 conductings, 21 drainings of second water vat.Since can actual reliable sealing configuration between water vat piston and water vat cylinder barrel, let out in can effectively preventing; Therefore, the present invention can effectively improve output flow and use water pressure not having on the basis of intermittently supplying water continuously.
In addition, water tank 3 can be connected to one with water vat.Shown in the figure, first water vat 11 and second water vat 21 all place water tank 3, all are fixedly connected with water tank 3 walls through adpting flange between water vat cylinder barrel and the cylinder tube.Obviously, as long as its mouth of a river is positioned at the basic need that suction just can be satisfied in the water line below of water tank 3.
Further combination is shown in Figure 2, and this figure is the structural representation of the said water vat cylinder barrel of this mode of execution.Offer the through hole 9 that is communicated with water tank 3 on the water vat cylinder barrel of the rod chamber outer end of each water vat (111, the 211) sidewall.Should be appreciated that through hole 9 can be set to a plurality of and circumferentially is uniformly distributed with along water vat cylinder barrel (111,211).
This through hole 9 can be used to the pressure that volume-variation produces in water vat cylinder barrel (111, the 211) rod chamber in the balance water vat piston motion process; When the water vat piston advances in cylinder barrel; Water vat piston rod chamber side volume becomes the big vacuum that produces, and external water gets into through this through hole 9; Otherwise when the water vat piston was retreated in cylinder barrel, the water vat piston rod chamber side volume generation pressure that diminishes, water then extruded from this through hole 9.In addition, water can from through hole 9 into and out of, thereby the oil cylinder piston bar that is connected with the water vat piston of cooling, and piston rod can carry out cooling heat dissipation to hydraulic oil.
Remove above-mentioned plunger water pump, this programme also provides a kind of hydraulic control system of this plunger water pump, sees also Fig. 3, and this figure is the schematic diagram of plunger water pump hydraulic control system.
The pressure oil circuit P and the oil return circuit T of this hydraulic control system can select system pressure oil circuit, oil return circuit for use, and corresponding oil pump also can independently be set provides plunger water pump required pressure oil liquid.Function based on first oil cylinder 12 and second oil cylinder 22 needs; Control valve is configured to have two working positions: in first working position; Pressure oil circuit P is communicated with the rodless cavity of first oil cylinder 12, the rod chamber of second oil cylinder 22; Oil return circuit T is communicated with the rod chamber of first oil cylinder 12, the rodless cavity of second oil cylinder 22, controls rodless cavity oil-feed, the rod chamber oil return of first oil cylinder 12, the rod chamber oil-feed of second oil cylinder 22, rodless cavity oil return with this; In second working position; Pressure oil circuit P is communicated with the rod chamber of first oil cylinder 12, the rodless cavity of second oil cylinder 22; Oil return circuit T is communicated with the rodless cavity of first oil cylinder 12, the rod chamber of second oil cylinder 22; Control rodless cavity oil return, the rod chamber oil-feed of first oil cylinder 12, the rod chamber oil return of second oil cylinder 22, rodless cavity oil-feed with this.
Need to prove; The concrete configuration of above-mentioned control valve can be a position control valve; Also can be configured to the both direction control valve; That is, be specially: be arranged on two chambeies of first oil cylinder 12 and the first hydraulic control directional control valve 51 between pressure oil circuit P and the oil return circuit T, and be arranged on two chambeies of second oil cylinder 22 and the second hydraulic control directional control valve 52 between pressure oil circuit P and the oil return circuit T.Obviously, be configured to both direction control valve and each oil cylinder relative set, can further be beneficial to the optimization system control performance.
Further, offer the hydraulic fluid port 121 of winning the confidence that is communicated with inner cavity of cylinder on the cylinder barrel of first oil cylinder 12, this distance W between hydraulic fluid port 121 and the rodless cavity end of winning the confidence is greater than the length L of first oil cylinder piston 122; Equally, offer the hydraulic fluid port 221 of winning the confidence that is communicated with inner cavity of cylinder on the cylinder barrel of second oil cylinder 22, this distance between hydraulic fluid port 221 and the rodless cavity end of winning the confidence is greater than the length of second oil cylinder piston 222.That is to say that when piston extend out to stroke terminal, the pressure of the corresponding hydraulic fluid port of winning the confidence was the oil liquid pressure that driven plunger is stretched out, between two working positions, switch with control both direction valve.Specifically as shown in Figure 3; The hydraulic fluid port 121 of winning the confidence of first oil cylinder 12 is communicated with the right side control port of the first hydraulic control directional control valve 51 and the left side control port of the second hydraulic control directional control valve 52; To drive the first hydraulic control directional control valve 51 and the second hydraulic control directional control valve 52 lays respectively at first working position and second working position; The hydraulic fluid port of winning the confidence of second oil cylinder 22 is communicated with the left side control port of the first hydraulic control directional control valve 51 and the right side control port of the second hydraulic control directional control valve 52, to drive the first hydraulic control directional control valve 51 and the second hydraulic control directional control valve 52 lays respectively at second working position and first working position.
This programme also comprises two valves of winning the confidence, and first wins the confidence valve 61 between first oil cylinder 12 and hydraulic control position control valve, and second wins the confidence valve 62 between second oil cylinder 22 and hydraulic control position control valve.As shown in the figure, the filler opening A of each valve of winning the confidence is communicated with the hydraulic fluid port of winning the confidence of corresponding oil cylinder, pressure balance hydraulic fluid port B is communicated with the hydraulic fluid port C of the rod chamber of corresponding oil cylinder, oil outlet D is communicated with the control port of corresponding hydraulic control directional control valve.So be provided with, can further improve the functional reliability of the switching-over of surging; Simultaneously; When oil cylinder piston when stretching out limit position, the pressure balance hydraulic fluid port B of the valve of winning the confidence is communicated with oil return circuit T, the filler opening A of the valve of winning the confidence is communicated with system pressure oil circuit P; Therefore; The pressure oil liquid of rodless cavity can be through the valve one-way flow of winning the confidence to rod chamber, and then avoids stretching out the terminal and produce and impact, and influences the stability of system works.
Equally, for avoiding oil cylinder regaining the unnecessary rigid impulse of limit position generation.This programme can be provided with the buffering bypass of regaining the unidirectional conducting of direction along piston in the cylinder barrel bottom of two oil cylinders.Specifically as shown in the figure, the oil outlet E of buffering bypass is communicated with inner cavity of cylinder through cylinder tube bottom, and the filler opening F that cushions bypass is communicated with inner cavity of cylinder through the cylinder barrel sidewall of the distance between bottom cylinder barrel greater than oil cylinder piston length place.In like manner; When the approaching withdrawal of oil cylinder piston limit position; The oil outlet E of buffering bypass is communicated with oil return circuit T, and the filler opening F of buffering bypass is communicated with pressure oil circuit P, therefore; This moment, the pressure oil liquid of rod chamber can flow to rodless cavity through the one-way valve in the buffering bypass, avoided regaining the end generation and impacted.
As preceding mentioned, pressure oil circuit P can adopt independently oil pump to be respectively two oil cylinders pressure oil liquid is provided, to adapt to the function needs of plunger water pump preferably.As shown in the figure, through pressure oil route first pump 71 fuel feeding that the first hydraulic control directional control valve 51 is communicated with first oil cylinder 12, pressure oil route second pump 72 fuel feeding that the warp second hydraulic control directional control valve 52 is communicated with second oil cylinder 22; And, between the liquid outlet of two pumps and oil return circuit, be provided with relief valve (first relief valve 81 and second relief valve 82), be in constant state with two charge oil pressures of reliable maintenance.
Relief valve (first relief valve 81 and second relief valve 82) preferably adopts automatically controlled relief valve; As shown in the figure; When its control valve not when electric, the liquid entering hole of this relief valve constitutes the draining path via this control valve, i.e. the pressure oil liquid of the liquid outlet of self-pumping output directly is back to fuel tank; When its control valve gets when electric, relief valve plays level pressure overflow and safety protection effect.During actual design, the set pressure of two relief valves is selected consistent, makes two oil cylinders be in identical working environment, guarantees action switching reliably between the two.
The above is merely preferred implementation of the present invention, does not constitute the qualification to protection domain of the present invention.Any any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection domain of the present invention.

Claims (10)

1. plunger water pump; It is characterized in that; Comprise two plunger groups that constitute by water vat and oil cylinder; The water vat piston of each plunger group and oil cylinder piston synchronous shift, and with the mouth of a river of each water vat cylinder barrel all be communicated be provided with by outward to the water inlet one-way valve of the unidirectional conducting of inner cavity of cylinder, by the water one-way valve that goes out of inner cavity of cylinder to the unidirectional conducting of outside water outlet; Two said oil cylinders are configured under the control of control valve alternately flexible.
2. plunger water pump according to claim 1 is characterized in that, also comprises water tank, and two said water vats are built in the said water tank.
3. plunger water pump according to claim 2 is characterized in that, offers the through hole that is communicated with said water tank on the water vat cylinder barrel sidewall of the rod chamber outer end of said water vat.
4. according to claim 2 or 3 described plunger water pumps, it is characterized in that said outside water outlet is positioned at and two said ends that go out the outlet pipe that water one-way valve is communicated with.
5. like the hydraulic control system of each said plunger water pump among the claim 1-4; It is characterized in that; Comprise pressure oil circuit and oil return circuit; Said control valve is configured to have two working positions: in first working position, the pressure oil circuit is communicated with the rodless cavity of first oil cylinder, the rod chamber of second oil cylinder, and oil return circuit is communicated with the rod chamber of first oil cylinder, the rodless cavity of second oil cylinder; In second working position, the pressure oil circuit is communicated with the rod chamber of first oil cylinder, the rodless cavity of second oil cylinder, and oil return circuit is communicated with the rodless cavity of first oil cylinder, the rod chamber of second oil cylinder.
6. plunger water pump hydraulic control system according to claim 5; It is characterized in that; Said control valve is specially: be arranged on two chambeies of first oil cylinder and the first hydraulic control directional control valve between pressure oil circuit and the oil return circuit, and be arranged on two chambeies of second oil cylinder and the second hydraulic control directional control valve between pressure oil circuit and the oil return circuit;
And two said oil cylinders all offer the hydraulic fluid port of winning the confidence that is communicated with inner cavity of cylinder, said win the confidence hydraulic fluid port and the rodless cavity end between the cylinder barrel sidewall of distance greater than oil cylinder piston length place on; And the hydraulic fluid port of winning the confidence of said first oil cylinder is communicated with the control port of the said first hydraulic control directional control valve and the second hydraulic control directional control valve; To drive the first hydraulic control directional control valve and the second hydraulic control directional control valve lays respectively at first working position and second working position; The hydraulic fluid port of winning the confidence of said second oil cylinder is communicated with the control port of the said first hydraulic control directional control valve and the second hydraulic control directional control valve, to drive the first hydraulic control directional control valve and the second hydraulic control directional control valve lays respectively at second working position and first working position.
7. plunger water pump hydraulic control system according to claim 6; It is characterized in that; Also comprise two valves of winning the confidence that are separately positioned between two oil cylinders and the corresponding hydraulic control directional control valve, the filler opening of each valve of winning the confidence is communicated with the hydraulic fluid port of winning the confidence of corresponding oil cylinder, the pressure balance hydraulic fluid port is communicated with the hydraulic fluid port of the rod chamber of corresponding oil cylinder, oil outlet is communicated with the control port of corresponding hydraulic control directional control valve.
8. plunger water pump hydraulic control system according to claim 7; It is characterized in that; The cylinder barrel bottom of two said oil cylinders is provided with the buffering bypass of regaining the unidirectional conducting of direction along piston; The oil outlet of said buffering bypass is communicated with inner cavity of cylinder through cylinder tube bottom, and the filler opening of said buffering bypass is communicated with inner cavity of cylinder through the cylinder barrel sidewall of the distance between bottom cylinder barrel greater than oil cylinder piston length place.
9. plunger water pump hydraulic control system according to claim 8; It is characterized in that; Pressure oil route first oil pump feed that is communicated with first oil cylinder through the said first hydraulic control directional control valve, pressure oil route second oil pump feed that is communicated with second oil cylinder through the said second hydraulic control directional control valve; And, between the liquid outlet of two pumps and oil return circuit, be provided with relief valve.
10. plunger water pump hydraulic control system according to claim 9 is characterized in that said relief valve is specially automatically controlled relief valve.
CN201110272366A 2011-09-14 2011-09-14 Plunger water pump and liquid control system thereof Pending CN102330649A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201110272366A CN102330649A (en) 2011-09-14 2011-09-14 Plunger water pump and liquid control system thereof
PCT/CN2012/071111 WO2013037198A1 (en) 2011-09-14 2012-02-14 Water plunger pump and hydraulic control system thereof
RU2014113204/06A RU2579540C2 (en) 2011-09-14 2012-02-14 Water plunger pump and its fluid control system
BR112014005904A BR112014005904A2 (en) 2011-09-14 2012-02-14 piston water pump and its hydraulic control system
AU2012308005A AU2012308005A1 (en) 2011-09-14 2012-02-14 Water plunger pump and hydraulic control system thereof

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WO2013037198A1 (en) * 2011-09-14 2013-03-21 徐州重型机械有限公司 Water plunger pump and hydraulic control system thereof
CN103191669A (en) * 2013-03-25 2013-07-10 中国矿业大学 Emulsion automatic preparation device
CN104976165A (en) * 2015-06-10 2015-10-14 西南交通大学 Water pressure variable pump
CN106523315A (en) * 2016-11-24 2017-03-22 南通爱慕希机械股份有限公司 Intelligent water injection pump for hydraulic plunger piston
CN107387353A (en) * 2017-08-30 2017-11-24 张家口德中钻探机械有限责任公司 Super-pressure water pump
CN110701032A (en) * 2019-10-23 2020-01-17 徐州晟源环境科技有限公司 Constant-pressure constant-flow sludge pumping system
CN114658642A (en) * 2022-03-21 2022-06-24 浙江美罗机电有限公司 Automatic controller for water pump

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CN110566527A (en) * 2019-09-26 2019-12-13 长沙远大住宅工业集团股份有限公司 hydraulic drive system

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WO2013037198A1 (en) * 2011-09-14 2013-03-21 徐州重型机械有限公司 Water plunger pump and hydraulic control system thereof
CN103191669A (en) * 2013-03-25 2013-07-10 中国矿业大学 Emulsion automatic preparation device
CN104976165A (en) * 2015-06-10 2015-10-14 西南交通大学 Water pressure variable pump
CN104976165B (en) * 2015-06-10 2017-01-25 西南交通大学 Water pressure variable pump
CN106523315A (en) * 2016-11-24 2017-03-22 南通爱慕希机械股份有限公司 Intelligent water injection pump for hydraulic plunger piston
CN107387353A (en) * 2017-08-30 2017-11-24 张家口德中钻探机械有限责任公司 Super-pressure water pump
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CN110701032A (en) * 2019-10-23 2020-01-17 徐州晟源环境科技有限公司 Constant-pressure constant-flow sludge pumping system
CN114658642A (en) * 2022-03-21 2022-06-24 浙江美罗机电有限公司 Automatic controller for water pump
CN114658642B (en) * 2022-03-21 2024-02-06 浙江美罗机电有限公司 Automatic controller for water pump

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WO2013037198A1 (en) 2013-03-21
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BR112014005904A2 (en) 2017-04-04
AU2012308005A1 (en) 2014-03-27

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Application publication date: 20120125